Keystones
Secure & Hygienic - Made for Cask Ale Systems
UB Plastics’ keystones are a trusted sealing component in traditional cask conditioning systems. Manufactured from a tough, food-grade thermoplastic elastomer, they ensure a reliable, hygienic seal while allowing for easy one-piece removal, whether manually or with automated extraction tools.
Designed to perform under the heat and pressure of commercial cask washing processes, our keystones are available in both standard and “tutted” formats to suit your handling requirements. With a wide choice of colours, they also support product identification and branding across your cask fleet.
Key Features
- One-piece removable design
- Available in standard and "tutted" formats
- Made from food-grade thermoplastic elastomer
- Heat- and pressure-resistant for cask washing
- Packed in bags of 2,000
Full Product Information
Sizes & Compatibility
UB Plastics’ keystones are designed for use in traditional cask ale systems and are suitable for a wide range of cask types used across the brewing industry. The one-piece design ensures fast insertion and easy extraction, making them ideal for both manual and automated processes.
Formats available:
- Standard keystone
- Tutted keystone (with grip feature for easier removal)
Material:
- Tough, food-grade thermoplastic elastomer (TPE)
Application:
- Manual or automated insertion and removal
- Compatible with standard stainless steel and plastic casks
Packaging & Sustainability
All UB Plastics keystones are manufactured at our Burton-upon-Trent site using efficient, high-volume tooling. We use virgin thermoplastic elastomer (TPE) for consistent performance and pack keystones in durable sacks designed for easy handling, transport and storage.
Pack Quantity:
- 2,000 units per bag
Sustainability Notes:
- Made from virgin TPE
- Minimal-waste manufacturing
- Suitable for closed-loop brewery systems
Why Choose UB Plastics for your Tamper Evident Caps?
With over 40 years of experience supplying the brewing industry, UB Plastics understands the real-world demands of cask conditioning systems. Our keystones are manufactured using controlled processes to ensure clean extraction, secure sealing and high-volume repeatability, all backed by responsive service and short lead times.
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